/Engine/Source/Developer/ToolWidgets/Public/SSearchableComboBox.h
Sets the selected item.Bydefault, registers as a navigation request, whichdoes notset the cached selected item, only updating the visually selected item.
void SetSelectedItem ( [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FString](API\Runtime\Core\Containers\FString) > InSelectedItem, [ESelectInfo::Type](API\Runtime\SlateCore\Types\ESelectInfo__Type) InSelectInfo )